There's not a lot of incentive to be running cursed weaponry on hexers right now due to the nerfs that happened to Dark Invasion, also Evil Force doesn't see much use because the passive itself is not worth the skill points if hexer is not main classed.

Most basic attacking builds are not running hexer as main class either, maybe we'd see people stray away from vorpal or bloodhunt nearly as often if Evil Force wasn't halved while Hexer is sub-classed, also there's more hexer main class skills now that still facilitate it as being worth main class to other setups.

TL;DR, can we please remove the main class stipulation on Evil Force? Claret call and ignite power are not main class and achieve even more damage than it.